Method of and mechanism for opening sheets in sheet-handling machines



N0 29, 1932- o. KLElNscHMlT ET AL. 1,889,354

METHOD OF AND MECHANISM FOR OPENING SHEETS IN SHEET HANDLING MACHINESFiled Deo. l5. 1951 5 SheetS-Sheevb l fol-nav BJMZQZ @weer /ffec'wrcmfanal N0 29, 1932- 0, KLElNscHMlT ET AL 1,389,364

METHOD OF AND MECHANISM FOR OPENING SHEETS IN SHEET HANDLING MACHINESFiled nec. 15, 1951 5 sheets-sheet 2 @VMM o, KLEINSCHMIT ET AL.1,889,364 I METHOD OF AND MECHANISM FOR OPENING SHEETS IN SHEET HANDLINGMACHINES Filed Dep. 15K, 1931 5 Sheets-Sheet 5 Nov. 29, 1932. o.KLElNscHNnT ET AL 1,889,364 METHOD OF AND MECHANISM FOR OPENING SHEETSIN SHEET HANDLING MACHINES l Filed Deu, 415, 1931 5 Sheets-Sheet 4 Nov.29, 1932. o. KLEINSCHMIT ET AL. 1,889,364

METHOD OE AND MEOHANISM EOE OPENING SHEETS IN SHEET HANDLING MACHINESFiled Deo. 15, 1931 5 Sheets-Sheet 5 Patented Nov. 29, 1932 rre STATESOSCAR KLEINSHMIT AND RUDOLF KLEMM, OF LEIPZIG-PLAGWITZ, GERMANY, ASSIGN-ORS T0 GEBR'UDER BREHMER, OF LEIPZIGePLAG'WITZGERIVIANY, A LIMITED PART-NERSHP OF GERMANY METHD QF AND MECHANSM FOR OPENING SHEETS INSHEET-HANDLING- MACHINES Applcaticn led December 15, 1931, Serial No.581,230, and in Germany February 7, 1931.

rlhe present invention relates to sheet-handling machines and moreparticularly concerns such machines in which inversely r0- tatingsuction rolls are used to open folded snc-ets and deposit the saidopened sheets straddlewise upon a carrier or conveyor.

When such sheet feed devices are used in sheet-handling machines of theswinging carrier type, it is necessary to pass the sheets between thesuction rolls at a high speed which "anders the sheet opening deviceuseless for practical and efhcient operation of the machine. That is tosay, the swinging sheet carrier remains in the feed posit-ion beneaththe suction rolls for a comparatively short period of each sheethandling operation and censcquently the sheets must needs be fed theretoat high speed, thereby causing the sheets to lbe thrown too rapidly andcomaratively haphazardly on to the conveying saddle. Moreover. whenfolded sheets are conveyed to such feed devices, the forward or openedges of the sheetare apt to register with the suction rolls in aslightly inaccurate manner which causes'faulty work as is Well knowninthe art.

The object kof this invention is to provide means for obviating thesedisadvantages einen utilizing inversely rotating suction rolls for thepurpose above described.

. According to the method of this invention of `opening and feedingfolded sheets to the moif'abie sheet carrier of a boohebinding machine9a sheet-opening and feeding device during operative period. thereof iscaused to move with the sheet carrier through some part of the travel ofthe latter. Y

ln order to carry this method into effect in a sheet-handling machine ofthe swinging sheet carrier type mechanism may be provided whereby theentire sheet-opening device is arranged to move with the sheet carrieras the latter travels towards the requisite sheet-handling means.Y Tothis end, the sheet-opening operation is timed to. commence ust beforethe sheet carrier is returned to the initial feed position and thelateral movement thereof commences with the return or working movementof the sheet'carricr and is reversed immediately after the folded sheetis opened and placed upon the sheet carrier. Alternatively thesheet-opening device may be arranged to alter, about a fixed point7 itsposition relative to the swinging sheet carrier and so extend or prolongthe sheet-feeding period of each reciprocatory movement of the swingingsheet-carrier.

rlhis arrangement enables the sheet to be fed to the sheet carrier at aslower speed and thus ensures that the transfer of the sheet is smoothlyexecuted. ln order that the folded sheets may be accurately registeredwith and seized by the inversely rotating suction rolls, means may beprovided to oscillate the suction rolls instead of completely rotatingthem while, at the requisite moment, the suction rolls are causedmomentarily to move apart and thus allow the lower edges of the foldedsheet to rest upon an appropriate registering stop interposed in thepath of movement of the sheet.

In order that the above described invention may be more clearlyunderstood two constructional embodiments thereof will now be describedby way of example with reference to the accompanying drawings in which:

Fig. 1 shows in part sectional side elevation, an automaticsheet-,feeding device comprising inversely rotating suction rollsarranged to operate according to this invention and associated with abook-binding machine of the swinging sheet-carrier type.

Fig. 2 is a plan view of the sheet-feeding device shown in Fig. l. y

Figs. 3, 4, 5 and 6 are diagrammatic side elevational views showing thevarying rela.` tive positions of the moving sheet-feed device and theswinging sheet-carrier during a complete sheet-feeding operation.

Fig. 7 is a part sectional side elevational view of a sheet feeding unitsimilar to that shown in Fig. l but provided with an alternativearrangement of the inversely rotating sheet opening rolls.

Figs. 8 and 9 show, diagrammatically, different operative positions ofthe sheet opening rolls and sheet carrier when operating according tothe alternative arrangement shown in Fig. .75 while Fig. 10 is a detailview of the sheet opening rolls and associated mechanism drawn to alarger scale.

Referrii to F l, it Will be seen that the book-binding machine shown isof the usual swingingsheet-carrier type wherein the side frames 12 serveto support a stitcher head 13 or a plurality of such stitcher headsmounted above a book-pad trough 14 and associated vith a swinging sheetcarrier 17 supported by oscillable arms 16 which are mounted on a shaft18 journaled in the side frames 12 and actuated in the usual mannerthrough cam timed mechanism generally indicated by the reference 15.

The sheet-feeding device which, in the present construction, is aseparate entity positioned adjacent the front or stitching side of thebook-stitching machine, as shown in Fig. 1, comprises side frames 10 inthe upper part of Which are ournalled the usual sheet conveyor pulleys1l around which pass the sheet conveyor belts 19, 19a Which latter, withthe aid of friction rolls 20, serve to convey the folded sheets orsignatures S to sheetopening suction rolls 24, 25. rldhe conveyor belt19a passes from the usual sheet feeding station (not shown) and around afurther guiding pulley 11a which is mounted as hereinafter describedadjacent the suction rolls 24, 25. rlhe latter, of which one pair areshown, may entend in a plurality of such pairs across the machinehorizontally of and immediately above the path of travel of the swingingsheet-carrier 17. ln the present construction, however, only one pair ofsuction rolls 24, 25 are provided and are iixedly mounted on transverseshafts 21, 22 respectively vvhich also serve to carry pairs of guidingor tensioning rolls 23, 23a, Fig. 2, of equal diameter to that of thesuction rolls 24, 25.

rhe shaft 22, common to the suction roll 25 and the guiding rolls 23a,is journalled in bearing brackets supported by a transverse slidablecarrier-bar 26 formed at its extremities With slides 26a adapted toengage in the oblique slide bearings 27 which latter are formed integralWith or attached to the side frames 10. The slide bearings 26 serve tosupport guides 28 in which are mounted slidable bearing members 29,which latter have journalled therein the shaft 21 common to the suctionroll 24 and guiding rolls T he shafts 21, 22 also have tixedly mountedthereon pinion Wheels 32, 33 which mesh with the intermeshing gearWheels 30, 31 respectively. rlhe latter are ournalled in bearingbrackets supported by the guides 23. rlChe conveyor belt pulley orpulleys 11a are also journalled in brackets mounted on the guides 23 andso partake of the linear movement of the suction rolls 24, 25.

Oscillatory motion is imparted to the suction rolls 24, 25 by a toothedsegment 34 which is pivoted on a shaft mounted on the Lesaeee carrierbar 2G and adapted to engage With the pinion 33 mounted on the shaft Thetoothed segment 34 is rigidly attached to a slotted curved lever 36 towhich is adjustably secured a connecting rod 3T linked to a rockinglever 33 which is actuated from a cam 39 mounted on a machine driveshaft 40. Through the cam 39 and interconnecting linkage abovedescribed, the suction roll 25 is oscillated and through the gear train33, 31, 30 and 32, the suction roll 24 is also oscillated in the inversedirection.

rlhe displacement of the sheet-opening suction rolls during theiroperative movement is arranged as follows: frs above described, thesuction rolls are supported indirectly by the carrier-bar 26. To each ofthe slides 26a thereof, one arm of a corresponding bellcrank lever 41 islinked by means of pivotal links 42. Each bell-crank lever is pivoted tothe machine frame and carries at the free extremity of its other arm acam follovver roller Wh'ch is engaged by a cam 43 mounted on the shaft40.

Vihe shaft is in geared driving connection with the sheet ca 1rier drive15 through the interposel gear train 'E 1, T2, T3, T4 and 'i`5 and,therefore, by imparting sliding movement to the carrier-bar 26 throughthe cams 43, bell-crank lever 41 and links 42, the suction rolls 24, 25are caused to move with the sheet-carrier through some part of thetravel of the latter. Sheet registering stops 44 are associated with therolls 24, and positioned between the various pair of guide rolls 23,230:. The stops in their operativo position 'are placed in the path oftravel of a sheet passing between the rolls and are adapted to be inthis position to act as registering stops for the sheet when the suctionrolls are moved apart as hereinafter described.

The stops 44 are mounted at the free ex tremities of arms 45 which arepivotally secured to crank levers 46, the latter being rigidly mountedon a shaft 47 ournalled in bearings carried by the carrier-bar slides26a. riie arms 45 are provided with rigid cam slotted extensions 49which engage a rigid bar 50 in order to control the movement of heregistering stops 44.

Relative auxiliary movement between the suction rolls 24, 25 is impartecthereto by the displacement of the roll 24. For this purpose, cam facedmembers 51, givotalljv supported on the slide bearings 27 are adapted toengage cam follower rollers rotatably mounted on the slidable bearings29. The cam-faced members 51 are rigidly mounted on a shaft 53 whichjournalled in brackets mounted on the slide bearings 2T. The shaft 53 isrocked, by means of a cam 5? mounted on the shaft 40, through thelinkage 54, and 56. rlhus, as the cam-faced member 51 is oscillated, theslidable bearing 29 together A gagement the suction rolls and guiderolls ISD mounted on the shafts.

The movement of `the registering sheet Vstops 44 is imparted theretothrough levers 48 rigidly attached to the shaft 47 and connected bymeans of pivotal links 58 to similar levers 59 rigidly mounted on theshaft 53. The movement of the registering stops 44 is thus in accordancewith Vthe relative movement of the suction sheet-opening rolls 24, 25.

The crank levers 46 are adapted to be adjustably mo-unted on the shaft47 so that they may be adjusted according to the length of thebook-sheet or signature while by reason of the slotted lever 36 theposition of its connection with the connecting rod 37 may be adjusted tovary the throw or oscillatory movement of the suction rolls 24, 25 inaccordance with the width of the sheets to be handled.

`The operation of this embodiment of the invention is as follows:

The folded sheet or signature S which is to be opened placed upon thesheet-carrier 17 and then stitched, is fed by the conveyor belts 19, 19ato the suction feed rolls or sheet-opening rolls 24, 25. The latterhave, at this period of the operation, been spaced apart by the timedmovement of the cam 57, and through the interconnecting linkage 48, 58and 59, the sheet-registering stops 44 are at the same time moved totheir'operative position as shown in Fig. 6. The folded sheet S isreleased by the conveyor belts and passes between the spaced suctionrolls and lodges its open edges on the registering stops 44 whilst thesheet carrier 17 is in the stitching position as shown in Fig. 1. Thesuction rolls, by reason of the continued movement of the cam 57, nowclose together and so contact with and seize the sheet t-hus registeredtherebetween. When the latter is seized by the suction rolls theregistering stops 44 are withdrawn from the path of travel thereof,being guided in their movement by the cam slotted guides 49 on the rigidbar 50. The suction rolls, by means ofthe toothed segment 34 and theassociated cam actuated mechanism, commence their inverse operativemovement in order to open the sheets as the sheet-carrier is registeringin the initial sheet feeding position during its idle return stroke,

Fiff. 3.

Limmediately the sheet-carrier reaches the end of its idle ret-urnstroke, its direction of movement is reversed and 1t commences to movetowards the stitching position. When the sheet carrier registers withthe suction rolls at the commencement of this next feedlng movement,linear movement in the same direction is imparted to the suction rolls,by the cam actuated movement of the carrier bar 26, and the suctionrolls and sheet fed thereby are moved in concert with the movingsheet'carrier as shown in Fig. 4.

' Owing to the relative positions of the pivot 18 of the swinging sheetcarrier 17 and the carrier bar slide bearings 27, the line of movementofthe suction rolls 24, 25 intersects the arcuate path of travel of thesheet carrier so that at the moment when the sheet is finally releasedfrom the suction rolls and placed on the sheet carrier the suction rollsand the folded edge of the sheet are close to the apex of the sheetcarrier as shown in Fig. 5. The sheet is thus placed gent-ly upon `thesheet carrier at a comparatively high speed without incurring the riskof displacement, the path of the suction rolls now leads away from thepath of the sheet carrier as the latter carries the sheet to beneath thestitcher heads 13 as shown in Fig. 1.

During the completion of the feeding movement of the sheet-carrier, theregistering stops are moved to their operative position and the suctionrolls moved apart as shown in Fig. 6 so that by means of the sheetconveyor belts 19a and friction rollers 20 which have moved with thesuction rolls, the feed to the latter of the next sheet or signature iscommenced before the return movement of the suction rolls to the initialsheet feed position as shown in Fig. 3.

The oscillatory movement of the suction rolls 24, 25 isso `timed by theactuating cam 39 that the suction orifices 24a, 25a are located abovethe contact line of thesuction rolls when the latter first engage thesheet as described, Fig. 6.

In the description of the above embodiment of the mechanism, thecomponent parts have been referred to for the sake of clarity as singlemembers, but it will be readily appreciated that in practice, a seriesof such members, arranged for preference, on common operating shaftstransversely of the machine, may be utilized. If so desired, the Vsheetopening device can be adapted to travel parallel to the path of movementof the swinging sheet carrier and along the full distance thereof. Itwill be appreciated that the method of selecting, separating and/orfeeding the folded sheets to the sheet opening devices is not materialto the invention above described and moreover, the method of suctioncontrol and/or'rotation of the suction rolls may be any one of thosecommonly known in the art.

Referring to Figs. 7, 8 and 9, a second embodiment of the inventioncomprises a sheetfeeding arrangement adapted for use with a book-bindingmachine of the swinging sheetcarrier type including a suction roll 24,forming one of an inversely rotating pair of such rolls 24, 25, which inaddition to its usual operative rotation is given an arcuate movementabout the pivot of the associated suction roll 25. i

T he rolls 24, or a plurality of such rolls are mounted on shafts 6l, 62respectively of which the shaft 62 may be journalled in the side frames10 of the machine while the shaft 6l is preferably mounted in pivotalarms, pivoted for instance on the shaft 62.

The shaft 62, journalled in the frame 10, has rotatably mounted thereonin addition to the suction roll 25 guide rolls (not shown) similar tothe rolls 23a shown in Fig. 2. Also freely mounted on the said shaft arebellcrank levers 63 each of which has one arm 64 thereof forked toreceive a slidable bearing block 65 in which block is ournalled theshaft 61 carrying the suction roll 24 and guide rolls corresponding tothose carried by the shaft 62. rEhe suction rolls and guide rollscarried by the shafts 6l, 62 are held in resilient engagement by meansof spiral springs 66 which are anchored to and extend between the saidshafts, while rollers or discs 65a for a purpose hereinafter to bedescribed are mounted also on the shaft 61.

A driving connection between the suction rolls 24, 25 is provided by thegear wheels 32,

fiziedly mounted on the shafts 6l, 62 respectively and the intermediategears 30, 3l, the latter being journalled in brackets mounted on the armof a bell-crank lever 63 and so partalring of the displacing movement ofthe said lever and roll 24.

In this arrangement, the parting of the suction rolls 24, 25 to receivethe sheet fed thereto, is effected by displacing the roll 24 in thefollowing manner:

A pivotal lever 67 pivoted at one extremity to the machine frame l0 andprovided with a cam follower adapted to engage a cam 66a mounted on thedrive shaft 40, lis connected at its further extremity by means of aconnecting rod 68 to one arm of a bell-crank lever 69 the latter beingpivoted to the machine frame 10. The second arm of the bellcrank lever69 is connected by means of a pitman 70 to one arm of a furtherbell-crank lever 7l which is pivctally mounted on the shaft 62. The arm72 of the bell-crank lever 7l is formed with a suitably shaped camfacedsegment 7 3 which latter is positioned to engage the rollers 65a carriedon the shaft 61 and so serves, when the cam 66a is rotated, to displacethe roll 24 against the action of the springs 66.

The arcuate movement of the roll 24 about the pivot of the roll 25 isimparted thereto by the cam 7 4 mounted on the driven shaft 40. Abell-,crank lever 75 pivoted to the machine frame 10 carries a camfollower adapted to engage the cam 74 and is connected by means of apitman 76 to the arm 63a of the bellcrank lever 63 which serves tosupport the suction roll 24. It will be obvious that by the arrangementdescribed the roll 24 is moved about the roll 25 in timed relation tothe rotation of the shaft 40. As described in reference to the firstembodiment the shaft 40 is driven from the main drive shaft of theassociated stitching machine.

As denoted by the corresponding references on Fig. 7'of the drawings,the arrangement of the mechanism for actuating the sheet stop 44 andimparting rotary movement to the sheet opening rolls 24, 25 andassociated guide rolls is similar to that above described in referenceto Figs. l to 6 and therefore does not require further description inreference to the present embodiment.

The operation of the feed device is as follows:

The suction rolls are positioned above and intermediate of the path oftravel of the sheet carrier 17 and when moved into the sheet receivingposition by the movement of `he cani 66a and the associated mechanismabove described are as shown in Fig. 7. When the suction rolls are sopositioned and prepared to receive a folded s ieet therebetween thesheet carrier 17 is in the stitching position as shown. During thereturn or idle stroke of the sheet-carrier, and the continued rotationof the cam 66a, the suction rolls are brought into engagement by thespiral springs 66 and commence to feed downward and open the foldedsheet now held thereby as shown in Fig. 8.

The rotation of the cam 74 is timed so that when the sheet-carrier 17,in its idle or return movement, passes beneath and beyond the suctionrolls, the roll 24 is swung about the pivot of the roll as abovedescribed and thus, whilst continuing to feed the sheet also follows themoving sheet-carrier as shown in Fig. 9.

rEhe effect of this movement of the roll 24 is to cause the right-handleaf of the signature S to feed in an oblique direction while keepingabove the apex of the sheet carrier, and the left-hand leaf of thesignature to move in a downward and approximately vertical direction infront of the sheet-carrier, i. e. between the sheet-carrier and thestitcher heads.

Thus, the feed of the sheet is enabled to take place during aconsiderable part of the return or idle movement of the sheet-carrierand when the movement of the latter is reversed the suction roll 24 isreturned to the normal position shown in Figs. 7 and 8 and theright-hand leaf of the signature S thereupon drops down upon the carrier17 and the latter, now moving forward in a sheet-feeding movementengages the left-hand leaf of the signature as will readily beunderstood.

The feed of the signature S is completed as the apeX 17 a of thesheet-carrier, in its arcuate path of movement, approaches the suctionrolls as indicated by the chain-dotted lines shown in Fig. 9. The sheetis thus released to lodge upon'the sheet-carrier when the apex 17a ofthe sheet carrier 17 is near to the folded edge of the sheet soreleased,'and

,y the sheet-carrier then conveys the sheet to book-binding machine,which includes causing a Asheet-opening'device during each operativeperiod thereof to move withV the said sheet-carrier through some part ofthe travel of the latter. f

2. A method of opening and feeding folded sheets to the. movablesheet-carrier of a book-binding machine, which includes-passing thefolded sheet between inversely rotatingfeed rolls and causing the saidfeed rolls to move in concert with a swinging sheet carrier during thefeed to the latter of the folded sheet opened by the said rolls.

3. Sheet feed apparatus for use in a book bindingmachine, comprising amovable 'sheet carrier, a'folded-sheet opening and :feeding device,means for movably suspending the said device above the path of' travelof the said s'heet'carrier, and means for imparting adisplacing movementto the said device relative to the movement ofthe said sheet-carrier.

4. Sheet feed apparatus for use in a bookbinding machine, comprising atravelling sheet-carrier, a folded-sheet opening and feeding device,means vfor movably suspending th'e said device above vthe path of travelof the said sheet carrier, means for displacing the said device relativeto the travel of the said sheet-carrier so that the distancetherebetween isr variedduring the said relative movements.

5. Sheet feed apparatusfo-r use in a bookbinding machine, comprising amovable sheet-carrier, a Vfolded-sheet opening and feeding device, andmeans for moving the said device in a path intersecting to the path ofmovement of the said sheet-carrier.

6. Sheet feed apparatus for use in a hookbinding machine, comprising aswinging sheet-carrier, inversely rotating sheet-feeding rolls`associated with said sheet-carrier, means fo-r actuating said rolls tofeed a folded sheet or signature to said sheet-carrier, and means formoving said sheet-feeding rolls with said swinging sheet carrier duringtheir feeding movements.

7. Sheet feed apparatus for use in a bookbinding machine, comprising asheet carrier, inversely rotating sheet-opening and feeding rollsassociated with said sheet carrier, means for moving said rolls apart toreceive a folded sheet therebetween, and means for rotating said rollsto open and feed said sheet to the said sheet-carrier. Y 8. Sheet feedapparatus for use in a bookbinding machine, comprising a. sheet-carrier,inversely rotating sheet opening and feeding rolls associated with saidsheet carrier, means for moving said rolls apart to receive a foldedsheet therebetween, means for registering the said sheet in apredetermined position between, said parted feedrolls, means for causingsaid rolls to engage said sheet, and means for rotating said rolls toopen said sheet and feed it to the said sheet-carrier.

9. Sheet feedapparatus for use in a bookbinding machine, comprising amovable sheet carrier, inversely rotating sheet opening and feedingrolls associated with said sheet carrier, means for moving said rollsapart to receive therebetween a folded sheet, means for rotating saidrolls to open and feed said sheet to the said carrier, and means forimparting to at least one of said rolls a displacing movement relativeto the movement of the said sheet carrier.

l0. Sheet feed apparatus for use in a bookbinding machine, comprising amovable sheet carrier, inversely rotating sheet opening and feedingrolls associated with said sheet carrier, means for moving said rollsapart to receive therebetween a folded signature, means for'registeringthe sheet in a predetermined position between said parted feed rolls,means for causing said rolls to engage said sheet, means for rotatingsaid rolls to open said sheet and feed it to the said sheet carrier, andmeans for imparting to at least one of said rolls a displacing movementrelative'to the movement of the said sheet carrier.

11. Sheet-feed apparatus for use in a bookbinding machine, comprising amovable sheet carrier, inversely rotating sheet opening and feedingrolls associated with said sheet carrier, means for feeding a foldedsheet to said rolls, means for holding said rolls in resilientengagement, means for parting said rolls to receive therebetween thefolded sheet, means for registering the said sheet in a predeterminedposition between said rolls, means for restoring said rolls to the sheetengaging position, means for oscillating said rolls to feed the sheet tothe said movable sheet carrier, and means for imparting to at least oneof said sheet feeding rolls a displacing movement relative to themovement of the said sheet carrier.

l2. A sheet feed device for use with a bookbinding machinel of theswinging sheetcarrier type, comprising in combination a supportingframe, inversely rotating sheet feed rolls slidably mounted in saidframe, sheet conveyor belts associated with said feed rolls, means foroscillating the said feed rolls to open the folded sheet seized thereby,means for imparting linear movement to the said sheet opening rolls in apath intersecting the path of movement of the swinging sheet carrier,and means for timing the operative movements of the said feed rolls inaccordance with the movementI of the said sheet carrier.

13. A sheet feed device for use with a book binding machine of theswinging sheet carrier type, comprising in combination, a supportingframe, a driven timing shaft journalled in said frame slide bearingsattached to said frame, slide members mounted in said bearings, atransverse bar secured to said slide members, a guideway mounted on saidtransverse bar, a bearing bracket mounted on said guideway, a rotarysuction roll ournaled in said bearing bracket, an auxiliary slide membermounted in said guideway, a second rotary suction roll journalled insaid auxiliary slide member and adapted to co-operatc with said firstsuction roll, means for feeding a folded sheet to the said suctionrolls, means for registering a folded sheet in a predetermined positionbetween said rolls, means for actuating from said timing shaft the rollsto open and feed said sheet to the swinging sheet carrier, and meansactuated from said timing shaft for moving the said slide members andauxiliary slide member in accordance with the movement of the said sheetcarrier.

14. A sheet feed device for use with a book binding machine of theswinging sheet earrier type, comprising in combination a supportingframe, a cam shaft journalled in said frame, timing cams mounted on saidshaft, slide bearings attached to vsaid frame, slide members mounted insaid bearings, a transverse bar secured to said slide members, guidcwaysmounted on said slide bearings, bearing brackets mounted on saidguideways, a shaft ournalled in said bearing brackets, a suction rollmounted on said shaft, guide rolls mounted on said shaft, auxiliaryslide members mounted in said slide bearings, a second shaft journalledin said auxiliary slide members, a second suction roll mounted on saidsecond shaft and associated with the first uct-ion roll, guide rollersmounted on the second shaft and associated with the first guide rolls,means operated from one of said cams for inversely oscillating` saidsuction rolls, means similarly operated for imparting linear movement tosaid osciilating rolls, and means for timing from the associatedbook-binding machine the actuation of the said sheet feeding device.

15. A sheet feed device for use with a book binding machine of theswinging sheet carrier type, comprising in combination, a

frame, a cam shaft journalled in said frame, timing cams mounted on saidshaft, slide bearings attached to said frame, slide members mounted insaid bearings, a transverse bar secured to said slide members, guidewaysmounted on said slide bearings, bearing brackets mounted on saidguideways, a shaft journalled in said bearing brackets, at least onesuction roll mounted on said shaft, guide rolls mounted on said shaft,auxiliary slide members mounted in said guideways, a second shaftparallel to and adjacent said first shaft and mounted in said auxiliaryslide members, a second suction roll associated with said first suctionroll and mounted on said second shaft, guide rolls mounted on saidsecond shaft and associated with said first guide rolls, means operatedfrom said cam shaft and linked to said auxiliary slide member for movingapart said suction rolls, movable sheet registering stops associatedwith said suction rolls, conveyor belts adapted to feed a folded sheetbetween the parted suction rolls and on to the said sheet registeringstops, adjustable means operated from said cam sha 't for inverselyoscillating said suction rolls, means operated from said cam shaft formoving said sheet registering stops in and out of the path of the saidsheet, means operated from said cam shaft and linked to said main slidebearings for moving the said inversely rotating sheet-feed rollsrelatively to the movement of the said sheet carrier, and means fortiming the operation of the said device from the associated book-bindingmachine.

16. A sheet feed device for use with a bookbinding machine of theswinging sheet-carrier type, comprising in combination, a frame, a camshaft journalled in said frame, timing cams mounted on said cam shaft, ashaft journalled in said frame, a suction roll iixedly mounted on saidshaft, guide rolls fixedly mounted on said shaft, forked levers freelymounted on said shaft, slidable bearing blocks mounted in said forkedlevers, a second shaft journalled in said bearing blocks, a secondsuction roll ixedly mounted on said second shaft, guide rolls mounted onsaid second shaft, means for holding said suction rolls in resilientengagement, means for parting said rolls, means for feeding a foldedsheet between said parted rolls, means for inversely oscillating abouttheir pivots the said suction rolls, means for rocking said forkedlevers to move the second suction roll about the pivot of the firstsuction roll, and means for timing the operative movements of the saidsuction rolls in accordance with the movement of the said sheet carrier.

17. A sheet feed device for use with a hook binding machine of theswinging sheet carrier type, comprising in combination, a frame, a camshaft journalled in said frame, timing cams mounted on said cam shaft, a

shaft journalled in said frame, a suction roll finedly mounted ou saidshaft, guide rolls lixedly mounted on said shaft, a pinion fixedlymounted on said shaft, an arcuate t-oothed rack pivoted to said frameand adapted to engage said pinion, bell-crank levers freely mounted onsaid shaft and each having one arm thereof forked, slidable bearingblocks mounted in the forked arms of said bell crank levers, a secondshaft journalled in said bear# ing blocks, a second suction roll fixedlymounted on said second shaft, guide rolls mounted on said second shaft,means for holding said suction rolls and guide rolls in resilientengagement, cam follower rollers mounted on said second shaft, a camfaced member mounted on said first shaft and adapted to engage said camfollower rollers, means actuated from one of said cams whereby said camfaced member is rocked, means actuated from said timing cams wherebysaid arcuate rack is rocked about its pivot to oscillate said suctionrolls, means actuated from one of said timing cams whereby saidbell-crank levers together with the suction rolls and guide rollssupported thereby are rocked about the said first shaft, and means forcontrolling the operative movements of the said timing cams inaccordance with the movement of the said sheet-carrier.

18. A sheet feed device as claimed in claim 17, which includes sheetconveyor belts to direct a folded sheet between the parted suctionrolls, friction rollers associated with said sheet conveyor belts, sheetregistering stops adapted to register said sheet in a. predeterminedposition between said parted rolls, and

means actuated from said cam shaft to re move said stops from the pathof the registered sheet.

19. Means for feeding a folded sheet to the suction rolls claimed inclaim 13 comprising belt pulleys mounted on the frame, a belt pulleyslidably mounted on the guide-- way, continuous conveyor belts passedaround said pulleys, and friction or sheet gripping rolls associatedwith said conveyor belts.

In testimony whereof we affix our signatures.

OSCAR KLEINSCHMIT. RUDOLF KLEMM.

